경제 불황이 광고 제작에 미치는 영향

이채현,이채현 한국마케팅관리학회 2021 한국마케팅관리학회 학술대회 Vol.2021 No.11

$TiB_2$ 첨가에 의한 탄화붕소 소결체의 파괴인성 증진

이채현,박원규,김종희 한국세라믹학회 1996 한국세라믹학회지 Vol.33 No.4

Toughening mechanism of boron carbide ceramics by the addition of titanium boride was investigated. Speci-men was prepared by hot pressing of boron carbide with upto 30vol% of titanium boride particulates. Toughness of boron carbide ceramics was increased from 4.7 MPa m1/2 to 6.3 MPa m1/2 with 15 vol% TiB2 addition. But further increase of TiB2 content results in slow decrease of toughness. From microstructure evaluation and crack propagation behavior it is concluded that the major toughening mechanism is crack deflection pheno-mena.

상박골 골절 치료에 있어서 Hanging Cast의 임상적 고찰

이채현 한국의 현대의학사 1969 한국의 현대의학 Vol.1 No.4

다문화 청소년과 일반 청소년의 건강위험 행태에 영향을 미치는 정신건강 요인 비교

이채현,이인숙 한국학교보건학회 2019 韓國學校保健學會誌 Vol.32 No.2

Purpose: The purpose of this study was to compare the mental health factors related to health risk behaviorsbetween multicultural and monocultural adolescents. Methods: The study subjects were selected from the 2018Korea Youth Risk Behavior Web-Based Survey Dataset. A total of 60,040 multicultural and monoculturaladolescents were included in the analysis. A x2test and logistic regression were conducted, using SPSS 18.0,to compare the general characteristics, mental health, and health risk behaviors of the multicultural and monoculturaladolescents. This process involved a complex sample design. Results: There was a significant differencein the rates of suicidal behaviors. Multicultural adolescents showed a significantly higher rate of suicidal ideation(8.6% vs. 8.5%, p=.004), suicidal plan (3.2% vs. 2.4%, p=.004), and suicidal attempt (5.0% vs 3.1%, p=.04) thanmonocultural adolescents. Perceived stress had a significant impact only on monocultural adolescents. Monoculturaladolescents with high levels of perceived stress were at a greater risk of drinking (high stress=reference;low stress OR=0.91, p=.025) and smoking (high stress=reference; low stress OR=0.90, p=.029) than those withlow stress. Multicultural adolescents who had made suicide attempts were at a higher risk of drinking (multiculturalOR=7.879, p<.001; monocultural OR=2.481, p<.001) and smoking (multicultural OR=4.011, p=.015; monoculturalOR=2.800, p<.001) than monocultural adolescents. Conclusion: To implement an effective smoking anddrinking prevention program, it is necessary to consider how we can reduce the risk factors. Stress managementis important for monocultural adolescents and a proactive suicide-screening program and a suicide preventionprogram should be included in the program for both multicultural and monocultural adolescents.

서비스 현장코칭품질이 서비스접점직원의 자기효능감과 회복탄력성에 미치는 영향

이채현,오해영,오선미,최정일 한국서비스경영학회 2019 서비스경영학회지 Vol.20 No.5

The purpose of this study is to examine the relationship between the coaching quality in service encounter and relationship quality on the self-efficacy and resilience of service encounter staff to improve capacity and service quality of service staff. For the purpose of this study, a structured questionnaire was conducted for those who participated in the coaching program, and the available 276 responses were collected and used for empirical analysis. In the hypothesis test, SPSS 22.0 ver and R-programming were used to analyze the effects of coaching program factor, coaching environment factor, coaching administrative factor, and relationship quality factors, trust and commitment on self-efficacy and resilience. As a result of statistical analysis, coaching program factors, coaching environment factors, and coaching administration factors showed positive effect on trust. Coaching program factors and coaching administrative factors also had a positive effect on commitment, but coaching environment factors don’t affect commitment. In addition, both trust and commitment were found to be significant for self-efficacy and positive effect on resilience. The implications of this study are that organizations recognize the importance of coaching and it could increase self-efficacy and resilience of organizational members through continuous coaching program.

배음의 주파수 분석을 통한 이미지 시각화 연구 - ‘애국가’를 통한 전자기호의 분석을 중심으로 -

이채현,김희준,김상열,김현빈 한국공학안전보건예술학회 2013 한국공학예술학회 논문지 Vol.5 No.-

소리를 시각적 자료로 변환하는 기본적인 목적은 소리의 음향학적 특성을 시각적 요소로 나타내어 분석하는 것이다. 현 재에도 소리에서 파형을 추출할 수는 있으나 이러한 파형은 특정한 감각을 느낄 수 있는 이미지라기보다 소리의 주파수를 탐색하는 연구 자료로서의 역할이 강하다. 본 연구에서는 이미지 생성을 연구 자료로서 뿐만 아니라 눈에 보이지 않는 소 리를 가시화하여 다양한 예술 분야에 응용 가능한 이미지를 생성할 수 있는 방법에 대해 알아보고자 하며 이는 시각예술 과 청각예술 간의 긍정적인 효과를 가져 올 수 있을 것이라 예상된다. Basic purpose of converting sounds to images is to analyze the sounds’ acoustic features through images. Currently still it’s possible to extract wavy patterns from sounds, yet those patterns appear to be research data rather than images which could bring certain sense of feeling. This study is about generating images which could not only be the research data but could make invisible sounds to visual forms for arranging to various art arena. Consequently, it could deliver the possbile effects between visual and aural art.

COVID-19 팬데믹의 지도화 동향에 대한 비판적 검토

이채현,하은혜,김감영 한국지도학회 2021 한국지도학회지 Vol.21 No.2

코로나바이러스감염증-19(COVID-19) 팬데믹 이후 시공간적 차원이 확대된 방대한 데이터를 보다 효과적으로 시각화할 필요성이 대두되었다. 본 연구의 목적은 COVID-19의 지도화 동향을 검토하고, 지도상에서 감염병의 시공간적 차원을 함께 재현하는 대안적 지도화 방안을 모색하는 것이다. 이를 위하여 COVID-19 데이터의 지도화 또는 지리적 시각화 관련 지도학적 논의를 포함하는 연구들을 광범위하게 검토하였다. COVID-19 정보 제공을 위해 가장 보편적으로 사용되는 기법인 대시보드는 정적 지도로서, 시공간적 차원이 동시에 변화하는 COVID-19의 역동성을 보여주지 못한다는 한계를 지닌다. 이러한 한계를 보완하기 위하여 지도 기호로서 그래프의 활용, 애니메이션 등 지도상에 시간적 차원을 반영하는 다양한 시도가 있었다. 선행연구 검토를 토대로, 본 연구는 시계열 스트립과 Dorling 카토그램 알고리즘을 적용하여 지도상에서 현상의 공간적 패턴과 시간에 따른 추이를 직관적으로 인지할 수 있는 대안적인 지리적 시각화 방안을 제시하였다. 본 연구는 팬데믹 시대에서 시공간적 차원이 확대된 지도 제작의 가능성을 확인하였다는 점에서 지도학적 의의를 가진다. Coronavirus Disease 2019 (COVID-19) Pandemic has raised the necessity of more effective visualization of vast data with expanded spatiotemporal dimensions. The purpose of this paper is to review the COVID-19 mapping trends and to suggest alternatives of mapping techniques that represent the spatiotemporal dimensions of the epidemic. To this end, this paper has reviewed studies that include discussions regarding mapping or geovisualization of COVID-19. The most commonly used technique for providing COVID-19 information is dashboard, which has limitations that they can’t reflect the dynamic of the epidemic as static map. To make up for these limitations, there have been various attempts to reflect temporal dimensions on the map, including the utilization of graphs as map symbols, and animations. Based on the review of prior study, this paper applied temporal strips and the Dorling catogram algorithm to suggest an alternative geovisualization techniques that can help map readers intuitively recognizes spatial patterns and temporal trends of phenomena on maps. This paper has cartographic significance in that it identified the possibility of map-making with expanded spatiotemporal dimensions in the Pandemic era.

Strategy to Obtain Photostability of Organic-inorganic Hybrid Perovskite

이채현,이수정,우연수,박득희,신예지,이유정,박세은,윤석준 한국공업화학회 2020 한국공업화학회 연구논문 초록집 Vol.2020 No.-

From late 20^th century, the alternative energy resources have been studied to satisfy the energy demand, one of serious social issues. Among the renewable energy resources, solar energy can have the biggest potential of resources. To use the solar energy, researchers have been developed various field, such as solar cells, photocatalysis, hydrogen production, water splitting, and so on. Since 2009, research field about organic-inorganic hybrid perovskite has boomed in current next-generation solar cell research field, then the photoconversion efficiency of the perovskite solar cell (PSC) got the record over 24 % last year. To practicalize the PSCs, it is important to obtain photostability to get long-term stability. However, the early PSCs have one of the critical issues about the photostability: phase segregation. In this presentation, story will be given about fundamentals of the phase segregation of perovskite and how to overcome it to obtain the photostability.

From the Beginning, the Synthetic Strategies of the Perovskite Quantum Dots with High Quality

이채현,강동우,전병민,정지원,김경수,한동훈,박종인,윤석준 한국공업화학회 2020 한국공업화학회 연구논문 초록집 Vol.2020 No.-

Obtaining independent synthetic method for key materials of perovskite quantum dot for next-generation energy industry, are required to be localized due to Japanese export regulations. Perovskite quantum dots formed CsPbI₃-structure using synthesized and purified precursor, PbI₂. This study seeks to find correlation of the main material’s purity and the effect of perovskite quantum dot by making up a way for the main materials of the perovskite quantum dot. Quantitative analysis about the quantum dot were performed through tunneling electron microscope, X-ray diffractometer, scanning electron microscope, UV-visible absorption spectrophotometer, photoluminescence spectrophotometer, and so on. Photoluminescence quantum yield and stability measurements were able to inform that the correlation between purity of the materials and the performance of quantum dots. As a result, as the materials were refined, the performance of the quantum dots were improved.

향수

이채현 국제보건미용학회 2022 국제보건미용학회 학술컨퍼런스 Vol.2022 No.11